Skiving machine



'E. J. RAY

Aug. 30, 1938.

Filed Dec; 4; 1958 Patented Aug. 30, 1938 UNITED STATES SKIVING MACHINE.

Eugene J. Ray, Beverly, Mass., assignor to 'United Shoe -Machinery Corporation, .PatersomVV N. J., a corporation of New Jersey Application December 4, 1936,v Serial No. 114,167

7 Claims.

This invention relates to skiving machines and is herein disclosed as embodied in a skiving machne of the rotary tubular knife type having means for applying a lubricant to both sides of the edge of the knife.

In the skiving of certain kinds of work, for example, in skiving the margins of certain box toe stiffeners made of porous sheet material impregnated with an infiammable stiffening substance and` a substance to render the stifiening substance less infiammable, a deposit collects upon the edge of the knife which clings so firmly that it is difficult to remove and interferes with the proper operation of the machine.

It hasbeen found that in this and similar cases the difiiculty can be obviated by holding against the opposite sides of the edge of the knife two| lubricating pads which may conveniently be made of felt saturated with oil. According to one feature of the invention the pads are mounted in a carrier and acted upon by a yielding member in such manner that they are held respectively against opposite sides of the edge of the knife.

These and other features of the invention, including certain details of construction and combinations of parts, will be described as embodied in an illustratd machine and pointed out in the appended claims.

Referring to the accompanying drawing, the figure is a view partly in perspective and partly in section of a portion of a skiving machine.

The machine, except for the moistening device, is or may be substantially the same as the m'achine shown in United States Letters Patent No. 1,301,283, granted April 22, 1919, on an application filed in the name of Albert Latham, only so much of the machine being shown in the present drawing as is necessary for an understanding of the present invention. The machine is provided with a rotary tubular knife mounted on a rotary horizontal shaft 3. The upper part of the knife against which the work is fed projects up through a table 5. The frame of the machine consists of a main section, part of which appears in the drawing, and an auxiliary section (not shown) pivoted to the main section about a Vertical axis, said auxiliary section carrying among other elements a yieldingly mounted feed roll which, when the auxiliary section is swung into operative position, is located partly within the knife just below the edge of the upper portion thereof. When the auxiliary section is thus in operative position, the feed roll is driven from a clutch member 'l on the end of a continuously rotating shaft. Above the feed roll is a presser foot (not shown) which holds the work against the feed roll, said feed roll yielding bodily andv angularly in accordance with the position and shape of Vthe presser foot. The construction and mode of operation of the machine will not be further described, reference being had to the patent for details'not herein shown and described.

InV order to apply 'a lubricant to both sides of the edge of the knife, two pads 9, ll are provided, said pads being mounted respectively in holdersV E3, E5 which are rigid with a carrier Il pivoted at l9 to a stationary member in' the form of a bracket 2| which is fastened by screws 23 to the frame of the machine. The pad holder i 3 is riveted to the carrier ll the pad holder 15 being integral with the carrier. The bracket 2| consists of a horizontal portion which is engaged by the screws 23 and a portion having a curved face, the curvature of which corresponds to that of the tubular knife I. A tension spring 25, attached at its lower end to a tail on the carrier H and at its upper end to the horizontal portion of the bracket 2|, urges the carrier at all times to swing in a direction to press the pads 9 and ll respectively against opposite sides of the edge of the knife. These pads may be of any suitable material and are herein shown as being made of felt and adapted to hold a lubricating oil which may be supplied to them f from time to time by swinging aside the auxiliary portion on the frame so as to expose the pads (as shown in the figure) and dropping oil upon the pads from an oil can. The oiling device including its supporting bracket 2| is a unitary structure which can readily be attached to machines of the type shown in the Latham patent. All the change that need be made in such a machine is to drill two holes to receive the stems of the screws 23. The deviceis located entirely beneath the table, part of which is shown at 5, and the pads 9 and contact with the edge of the rotating knife at a locality at which the portion of the edge so engaged has just moved down from operative position above the table.

Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A skiving machine having, in combination, a tubLular knife rotatable about a substantially horizontal axis, a table through which the upper portion of the knife projects, a pad holder located beneath the table on one side of. the knife, a second pad holder located beneath the table on the other side of the knife, absorbent pads in the holders and yielding means for moving the holders in opposite directions to press the pads respectively against opposite sides of the edge of the knife.

2. A skiving machine having, in combination, a tubular knife rotatable about a substantially horizontal axis, a table through which the upper portion of the knife projects, a pad holder located beneath the table on one side of the knife, a second pad holder located beneath the table on the other side of the knife, absorbent pads in the holders and a single yielding means for moving the holders in opposite directions to press the pads respectively against opposite sides of the edge of the knife.

3. A skiving machine having, in combination, a driven knife, a pad holder located on one side of the edge of the knife, a second pad holder located on the other side of the knife, pads in the holders, a single carrier for the two pad holders, said carrier being pivoted to a stationary part of the machine, and yielding means urging the carrier to swing in a direction to press the pads respectively against opposite sides of the edge of the knife.

4. A skiving machine having, in combination, a driven knife, a pad holder located on one side of the edge of the knife, a second pad holder located on the other side of the knife, pads in the holders, a single carrier for the two pad holders, said carrier being pivoted to a stationary part of the machine, and a single yielding means urging the carrier to swing in a direction to press the pads respectively against opposite sides of the edge of the knife.

, 5. A skiving machine having a tubular knife rctatable about a substantially horizontal axis, I

a table through which the upper portion of the knife projects, a carrier pivoted to a stationary part of the machine and located below the level of the table, two pads supported by the carrier, one on one side of the edge of the knife and the other on the other side, and yielding means for urging the carrier to swing in a direction to press the pads respectively against opposite sides of the edge of. the knife.

6. A device for attachment to a skiving machine to lubricate the knife thereof, said device comprising a bracket adapted to be attached to the frame of the machine, a single pad-carrier pivoted to the bracket, pads mounted on the carrier in position to engage opposite sides of the edge of the knife, and a spring engaging at one end the carrier and at the other end the bracket and adapted to swing the carrier about its pivot.

'7. A skiving machine having, in combination, a driven knife, a carrier pivoted to a stationary part of the machine, two pad holders rigid with the carrier and located one on one side and the other on the other side of the knife, and yielding means for swinging the carrier about its pivot in a direction to press the pads respectively against opposite sides of the edge of the knife.

EUGENE J. RAY. 

